A general method for the controlled embedding of nanoparticles in silica colloids

被引：152
作者：
Graf, Christina [1 ]
Dembski, Sofia [1 ]
Hofmann, Andreas [1 ]
Ruehl, Eckart [1 ]
机构：
[1] Univ Wurzburg, Inst Chem Phys, D-97074 Wurzburg, Germany
来源：
LANGMUIR | 2006年 / 22卷 / 13期
关键词：
SEMICONDUCTOR QUANTUM DOTS; CDSE NANOCRYSTALS; FUNCTIONALIZED SILICA; GOLD NANOPARTICLES; SPHERES; PARTICLES; GROWTH; MONODISPERSE; ADSORPTION; SURFACES;
D O I：
10.1021/la060136w
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
A novel method for the controlled embedding of multiple nanoparticles of various materials, such as gold nanoparticles, quantum dots, and magnetic nanoparticles, in silica colloids is presented. After adsorption of the amphiphilic polymer poly( vinylpyrrolidone) on hydrophobic or hydrophilic stabilized nanoparticles, these are adsorbed on silica spheres and covered by variable-thickness silica shells. This silica coating protects the embedded nanoparticles against chemical transformations, which is of crucial importance for the biocompatibility of particles containing toxic elements. Moreover, it is found that the optical properties of the nanoparticles are retained. Possible applications of multicore particles are briefly discussed.
引用
收藏
页码：5604 / 5610
页数：7
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